PDF malware analysis — malicious · 0146069815f37320

MALICIOUS

PDF

91.2 KB Created: 2021-07-03 07:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 59f1b5d5b7e1b05c7a83f3dc6e1b402a SHA-1: 1aef8654ac116d146a183505a2e8e6ebd34e05d1 SHA-256: 0146069815f37320ffb3305880ac36ea8edebf472603b1d3f55e3e8083acd739

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an intent to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9822

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://eia-edu.com/userfiles/file/71232952334.pdf In PDF document text
- http://tpdw.pl/userfiles/file/4754137466.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/52k4jnd9lat2e199s26cjbnu1p/dasuzowupaga.pdfIn PDF document text
- http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b7b3ffc2d59b739ab0fb973698535c45/dapizigijirew.pdfIn PDF document text
- https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce070d7f5d---6234471056.pdfIn PDF document text
- http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/99241469897.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b732d3bf47---dikumepa.pdfIn PDF document text
- https://consultingexpert.eu/fckeditor/userfiles/file/pajujubodakifusig.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/68520453569.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bcfc179fd---10507260567.pdfIn PDF document text
- http://ahkkpcm.org/userfiles/42847390557.pdfIn PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/f7787cb3d2cbdbf494968df852ef64a1/93066222137.pdfIn PDF document text
- http://growlink.biz/userfiles/file/sobijolosipulojafuxum.pdfIn PDF document text
- http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160d504ed467b1---winebojupomilovipisuz.pdfIn PDF document text
- https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd11450876---26269932923.pdfIn PDF document text
- https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/17274af24e04a5ff44639805c623b705/baxijumogewapikelogonuvu.pdfIn PDF document text
- https://ddshower.com/ckfinder/userfiles/files/dizunafisarezoruzuxekov.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210604135228.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a626d6e43c8---gosamisisikibodokizogoj.pdfIn PDF document text
- https://666666.vn/upload/fck/file/giwinafuduribulum.pdfIn PDF document text
- https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/1i9icui5hs97k70ev4lfontsc6/jerovomisapujusadonus.pdfIn PDF document text
- https://khonggiansachhanoi.vn/uploads/files/65829398310.pdfIn PDF document text
- https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/t7hlagm48p20fuodlckcjbubo8/91106870247.pdfIn PDF document text
- https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d782256203---56070742486.pdfIn PDF document text
- http://toeicspeaking.net/_UploadFile/Images/file/lupatogutaki.pdfIn PDF document text
- http://afgventuregroup.com/cfiles/file/woxamorazetijofasuwisi.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/7e273d27abdc3632e5b2a526e1c4c263/tosadezofizukin.pdfIn PDF document text
- http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ff863369ec1d963338393109a6396fd9/tagurewazidatisexojob.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=dominated+meaning+in+tamil+with+examplePDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f45b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF45B	22720 bytes
SHA-256: `a3544a9afbc6c8b4c6cae7fc6016bbafee88e480af13465df8582e74f0bccc93`
`font_01_sfnt_off00012eb6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EB6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000146cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x146CD	10760 bytes
SHA-256: `20322bb838a98dbe7871c0ce96a98e6660b07f29c94cbc5a9935961ec072fc79`

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